AutoCodes – GMC – B2144 GMC

B2144 GMC Code - Outside Rearview Mirror Position Sensor Input Voltage Low

Quick Answer

The Memory Mirror Module (MMM) receives input from mirror position sensors during these functions: memory recall, memory seat, and easy exit. Common causes include Faulty Outside Rearview Mirror Motor, Outside Rearview Mirror Motor harness is open or shorted, Outside Rearview Mirror Motor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B2144 GMC indicates Outside Rearview Mirror Position Sensor Input Voltage Low.
Common causes: Common causes include Faulty Outside Rearview Mirror Motor, Outside Rearview Mirror Motor harness is open or shorted, Outside Rearview Mirror Motor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 521

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 19, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2144 GMC Description

The Memory Mirror Module (MMM) receives input from mirror position sensors during these functions: memory recall, memory seat, and easy exit. Potentiometers in position sensors vary in resistance as motors move outside rearview mirror. MMM receives a variable voltage input depending on resistance of the potentiometer. During memory set, MMM records voltages across outside rearview mirrors. During memory recall, MMM moves outside rearview mirror motor until the voltage across each potentiometer matches recorded the voltage. During normal operation, mirror position sensors are checked against out-of-range limits. Outside rearview mirrors horizontal or vertical position sensor input voltage is less than 0.25 volts.

OBDII Code B2144 GMC - Outside Rearview Mirror Position Sensor Input Voltage Low - AutoCodes.com — B2144 GMC Code - Outside Rearview Mirror Position Sensor Input Voltage Low

What does this mean?

What are the Possible Causes of the DTC B2144 GMC?

Faulty Outside Rearview Mirror Motor
Outside Rearview Mirror Motor harness is open or shorted
Outside Rearview Mirror Motor circuit poor electrical connection
Faulty Memory Mirror Module (MMM)

How to Fix the DTC B2144 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2144 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B2144 GMC Code

1. What are the common symptoms of OBDII code B2144 GMC?

The common symptoms of code B2144 GMC include malfunctioning power mirrors, erratic mirror movements, and warning lights on the dashboard.

2. What can cause the OBDII code B2144 GMC to trigger?

The code B2144 GMC is typically triggered when the outside rearview mirror position sensor input voltage is detected to be low, which can be caused by issues such as sensor malfunction or wiring problems.

3. How can I diagnose the OBDII code B2144 GMC?

Diagnosing code B2144 GMC involves using a scan tool to read the fault code, inspecting the wiring and connectors related to the outside rearview mirror position sensor, and testing the sensor itself for proper functionality.

4. What are the repair options for OBDII code B2144 GMC?

Repair options for code B2144 GMC may include replacing the outside rearview mirror position sensor, repairing or replacing damaged wiring, or addressing any underlying issues that may have caused the low input voltage.

5. Can I drive my vehicle with the OBDII code B2144 GMC active?

It is generally safe to drive your vehicle with the OBDII code B2144 GMC active, but it is recommended to address the issue promptly to ensure proper functioning of the outside rearview mirror system.

6. How much does it cost to repair OBDII code B2144 GMC?

The cost of repairing code B2144 GMC can vary depending on the specific cause of the issue, but it may involve sensor replacement, wiring repairs, or other corrective actions that can range from relatively inexpensive to more costly.

7. Is the OBDII code B2144 GMC a serious issue?

While the OBDII code B2144 GMC is not considered a critical or safety-related issue, it can affect the functionality of your vehicle's outside rearview mirrors and may be inconvenient if left unaddressed.

8. Can I reset the OBDII code B2144 GMC without repairs?

Resetting the OBDII code B2144 GMC without addressing the underlying issue will likely result in the code reappearing once the problem is detected again by the vehicle's system.

9. Are there any preventative measures to avoid OBDII code B2144 GMC?

Regularly inspecting and maintaining the outside rearview mirror system, including the sensor and wiring, can help prevent issues that may lead to the triggering of code B2144 GMC.

10. How long does it take to repair OBDII code B2144 GMC?

The time required to repair code B2144 GMC can vary based on the specific cause of the issue and the complexity of the repair process, but it may typically take anywhere from a few hours to a day at a repair shop.